447  
CDUS41 KPHI 050557  
CLIABE  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ  
1257 AM EST SUN DEC 05 2021  
   
...............................
 
 
   
..THE ALLENTOWN PA CLIMATE SUMMARY FOR DECEMBER 4 2021
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1922 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 50 2:19 PM 72 1998 47 3 49  
MINIMUM 32 7:49 AM 8 1940 29 3 32  
1966  
AVERAGE 41 38 3 41  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.63 1950 0.14 -0.14 0.42  
MONTH TO DATE 0.14 0.54 -0.40 0.42  
SINCE DEC 1 0.14 0.54 -0.40 0.42  
SINCE JAN 1 43.52 44.04 -0.52 45.80  
 
SNOWFALL (IN)  
YESTERDAY 0.0 4.1 1957 0.2 -0.2 0.0  
MONTH TO DATE 0.0 0.5 -0.5 T  
SINCE DEC 1 0.0 0.5 -0.5 T  
SINCE JUL 1 T 1.6 -1.6 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 24 27 -3 24  
MONTH TO DATE 93 106 -13 102  
SINCE DEC 1 93 106 -13 102  
SINCE JUL 1 1050 1145 -95 1065  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 997 981 16 1043    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION W (250)  
AVERAGE WIND SPEED 4.6  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 81 8:00 AM  
LOWEST 50 2:00 PM  
AVERAGE 66  
   
......................................................
 
 
THE ALLENTOWN PA CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 46 69 2001  
MINIMUM TEMPERATURE (F) 29 11 1926  
 
SUNRISE AND SUNSET  
DECEMBER 5 2021......SUNRISE 7:10 AM EST SUNSET 4:34 PM EST  
DECEMBER 6 2021......SUNRISE 7:11 AM EST SUNSET 4:34 PM EST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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